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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	string s;
  6. 	char ch;
  7. 	cin >> s;
  8. 	int n = s.size();
  9. 	if(isupper(s[0]))
  10. 	{
  11. 		for(int i=1;i<n;i++)
  12. 		{
  13. 			if(isupper(s[i]))
  14. 			{
  15. 				ch = tolower(s[i]);
  16. 				s[i] = ch;
  17. 			}
  18.  
  19. 		}
  20.  
  21. 			cout << s << endl;
  22.  
  23. 	}
  24. 	else{
  25. 		s[0] = toupper(s[0]);
  26. 		for(int i=1;i<n;i++)
  27. 		{
  28. 			if(isupper(s[i]))
  29. 			{
  30. 				ch = tolower(s[i]);
  31. 				s[i] = ch;
  32. 			}
  33.  
  34. 		}
  35. 		cout << s << endl;
  36. 	}
  37. 	return 0;
  38. }
Success #stdin #stdout 0s 5320KB
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https://ideone.com/JB1tFa
language:
C++ (gcc 8.3)
created:
17 hours ago
visibility:
public

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